| 1 | /*************************************************************************** |
| 2 | * Copyright (C) 2016 PCSX4ALL Team * |
| 3 | * Copyright (C) 2010 Unai * |
| 4 | * * |
| 5 | * This program is free software; you can redistribute it and/or modify * |
| 6 | * it under the terms of the GNU General Public License as published by * |
| 7 | * the Free Software Foundation; either version 2 of the License, or * |
| 8 | * (at your option) any later version. * |
| 9 | * * |
| 10 | * This program is distributed in the hope that it will be useful, * |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 13 | * GNU General Public License for more details. * |
| 14 | * * |
| 15 | * You should have received a copy of the GNU General Public License * |
| 16 | * along with this program; if not, write to the * |
| 17 | * Free Software Foundation, Inc., * |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * |
| 19 | ***************************************************************************/ |
| 20 | |
| 21 | #ifndef _OP_LIGHT_H_ |
| 22 | #define _OP_LIGHT_H_ |
| 23 | |
| 24 | // GPU color operations for lighting calculations |
| 25 | |
| 26 | static void SetupLightLUT() |
| 27 | { |
| 28 | // 1024-entry lookup table that modulates 5-bit texture + 5-bit light value. |
| 29 | // A light value of 15 does not modify the incoming texture color. |
| 30 | // LightLUT[32*32] array is initialized to following values: |
| 31 | // 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 32 | // 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 33 | // 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, |
| 34 | // 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, |
| 35 | // 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, |
| 36 | // 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, |
| 37 | // 0, 0, 0, 1, 1, 1, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, 9,10,10,10,11,11, |
| 38 | // 0, 0, 0, 1, 1, 2, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 7, 8, 8, 9, 9,10,10,10,11,11,12,12,13,13, |
| 39 | // 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9,10,10,11,11,12,12,13,13,14,14,15,15, |
| 40 | // 0, 0, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 7, 7, 8, 9, 9,10,10,11,11,12,12,13,14,14,15,15,16,16,17, |
| 41 | // 0, 0, 1, 1, 2, 3, 3, 4, 5, 5, 6, 6, 7, 8, 8, 9,10,10,11,11,12,13,13,14,15,15,16,16,17,18,18,19, |
| 42 | // 0, 0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9,10,11,11,12,13,13,14,15,15,16,17,17,18,19,19,20,21, |
| 43 | // 0, 0, 1, 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 9,10,11,12,12,13,14,15,15,16,17,18,18,19,20,21,21,22,23, |
| 44 | // 0, 0, 1, 2, 3, 4, 4, 5, 6, 7, 8, 8, 9,10,11,12,13,13,14,15,16,17,17,18,19,20,21,21,22,23,24,25, |
| 45 | // 0, 0, 1, 2, 3, 4, 5, 6, 7, 7, 8, 9,10,11,12,13,14,14,15,16,17,18,19,20,21,21,22,23,24,25,26,27, |
| 46 | // 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29, |
| 47 | // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31, |
| 48 | // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,31, |
| 49 | // 0, 1, 2, 3, 4, 5, 6, 7, 9,10,11,12,13,14,15,16,18,19,20,21,22,23,24,25,27,28,29,30,31,31,31,31, |
| 50 | // 0, 1, 2, 3, 4, 5, 7, 8, 9,10,11,13,14,15,16,17,19,20,21,22,23,24,26,27,28,29,30,31,31,31,31,31, |
| 51 | // 0, 1, 2, 3, 5, 6, 7, 8,10,11,12,13,15,16,17,18,20,21,22,23,25,26,27,28,30,31,31,31,31,31,31,31, |
| 52 | // 0, 1, 2, 3, 5, 6, 7, 9,10,11,13,14,15,17,18,19,21,22,23,24,26,27,28,30,31,31,31,31,31,31,31,31, |
| 53 | // 0, 1, 2, 4, 5, 6, 8, 9,11,12,13,15,16,17,19,20,22,23,24,26,27,28,30,31,31,31,31,31,31,31,31,31, |
| 54 | // 0, 1, 2, 4, 5, 7, 8,10,11,12,14,15,17,18,20,21,23,24,25,27,28,30,31,31,31,31,31,31,31,31,31,31, |
| 55 | // 0, 1, 3, 4, 6, 7, 9,10,12,13,15,16,18,19,21,22,24,25,27,28,30,31,31,31,31,31,31,31,31,31,31,31, |
| 56 | // 0, 1, 3, 4, 6, 7, 9,10,12,14,15,17,18,20,21,23,25,26,28,29,31,31,31,31,31,31,31,31,31,31,31,31, |
| 57 | // 0, 1, 3, 4, 6, 8, 9,11,13,14,16,17,19,21,22,24,26,27,29,30,31,31,31,31,31,31,31,31,31,31,31,31, |
| 58 | // 0, 1, 3, 5, 6, 8,10,11,13,15,16,18,20,21,23,25,27,28,30,31,31,31,31,31,31,31,31,31,31,31,31,31, |
| 59 | // 0, 1, 3, 5, 7, 8,10,12,14,15,17,19,21,22,24,26,28,29,31,31,31,31,31,31,31,31,31,31,31,31,31,31, |
| 60 | // 0, 1, 3, 5, 7, 9,10,12,14,16,18,19,21,23,25,27,29,30,31,31,31,31,31,31,31,31,31,31,31,31,31,31, |
| 61 | // 0, 1, 3, 5, 7, 9,11,13,15,16,18,20,22,24,26,28,30,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31, |
| 62 | // 0, 1, 3, 5, 7, 9,11,13,15,17,19,21,23,25,27,29,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31 |
| 63 | |
| 64 | for (int j=0; j < 32; ++j) { |
| 65 | for (int i=0; i < 32; ++i) { |
| 66 | int val = i * j / 16; |
| 67 | if (val > 31) val = 31; |
| 68 | gpu_senquack.LightLUT[(j*32) + i] = val; |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | |
| 74 | //////////////////////////////////////////////////////////////////////////////// |
| 75 | // Create packed Gouraud fixed-pt 8.3:8.3:8.2 rgb triplet |
| 76 | // |
| 77 | // INPUT: |
| 78 | // 'r','g','b' are 8.10 fixed-pt color components (r shown here) |
| 79 | // 'r' input: --------------rrrrrrrrXXXXXXXXXX |
| 80 | // ^ bit 31 |
| 81 | // RETURNS: |
| 82 | // u32 output: rrrrrrrrXXXggggggggXXXbbbbbbbbXX |
| 83 | // ^ bit 31 |
| 84 | // Where 'r,g,b' are integer bits of colors, 'X' fixed-pt, and '-' don't care |
| 85 | //////////////////////////////////////////////////////////////////////////////// |
| 86 | GPU_INLINE u32 gpuPackGouraudCol(u32 r, u32 g, u32 b) |
| 87 | { |
| 88 | return ((u32)(b>> 8)&(0x03ff )) |
| 89 | | ((u32)(g<< 3)&(0x07ff<<10)) |
| 90 | | ((u32)(r<<14)&(0x07ff<<21)); |
| 91 | } |
| 92 | |
| 93 | |
| 94 | //////////////////////////////////////////////////////////////////////////////// |
| 95 | // Create packed increment for Gouraud fixed-pt 8.3:8.3:8.2 rgb triplet |
| 96 | // |
| 97 | // INPUT: |
| 98 | // Sign-extended 8.10 fixed-pt r,g,b color increment values (only dr is shown) |
| 99 | // 'dr' input: ssssssssssssssrrrrrrrrXXXXXXXXXX |
| 100 | // ^ bit 31 |
| 101 | // RETURNS: |
| 102 | // u32 output: rrrrrrrrXXXggggggggXXXbbbbbbbbXX |
| 103 | // ^ bit 31 |
| 104 | // Where 'r,g,b' are integer bits of colors, 'X' fixed-pt, and 's' sign bits |
| 105 | // |
| 106 | // NOTE: The correctness of this code/method has not been fully verified, |
| 107 | // having been merely factored out from original code in |
| 108 | // poly-drawing functions. Feel free to check/improve it -senquack |
| 109 | //////////////////////////////////////////////////////////////////////////////// |
| 110 | GPU_INLINE u32 gpuPackGouraudColInc(s32 dr, s32 dg, s32 db) |
| 111 | { |
| 112 | u32 dr_tmp = (u32)(dr << 14)&(0xffffffff<<21); if (dr < 0) dr_tmp += 1<<21; |
| 113 | u32 dg_tmp = (u32)(dg << 3)&(0xffffffff<<10); if (dg < 0) dg_tmp += 1<<10; |
| 114 | u32 db_tmp = (u32)(db >> 8)&(0xffffffff ); if (db < 0) db_tmp += 1<< 0; |
| 115 | return db_tmp + dg_tmp + dr_tmp; |
| 116 | } |
| 117 | |
| 118 | |
| 119 | //////////////////////////////////////////////////////////////////////////////// |
| 120 | // Extract bgr555 color from Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet |
| 121 | // |
| 122 | // INPUT: |
| 123 | // 'gCol' input: rrrrrrrrXXXggggggggXXXbbbbbbbbXX |
| 124 | // ^ bit 31 |
| 125 | // RETURNS: |
| 126 | // u16 output: 0bbbbbgggggrrrrr |
| 127 | // ^ bit 16 |
| 128 | // Where 'r,g,b' are integer bits of colors, 'X' fixed-pt, and '0' zero |
| 129 | //////////////////////////////////////////////////////////////////////////////// |
| 130 | GPU_INLINE uint_fast16_t gpuLightingRGBGeneric(u32 gCol) |
| 131 | { |
| 132 | return ((gCol<< 5)&0x7C00) | |
| 133 | ((gCol>>11)&0x03E0) | |
| 134 | (gCol>>27); |
| 135 | } |
| 136 | |
| 137 | |
| 138 | //////////////////////////////////////////////////////////////////////////////// |
| 139 | // Convert packed Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet in 'gCol' |
| 140 | // to padded u32 5.4:5.4:5.4 bgr fixed-pt triplet, suitable for use |
| 141 | // with HQ 24-bit lighting/quantization. |
| 142 | // |
| 143 | // INPUT: |
| 144 | // 'gCol' input: rrrrrrrrXXXggggggggXXXbbbbbbbbXX |
| 145 | // ^ bit 31 |
| 146 | // RETURNS: |
| 147 | // u32 output: 000bbbbbXXXX0gggggXXXX0rrrrrXXXX |
| 148 | // ^ bit 31 |
| 149 | // Where 'X' are fixed-pt bits, '0' zero-padding, and '-' is don't care |
| 150 | //////////////////////////////////////////////////////////////////////////////// |
| 151 | GPU_INLINE u32 gpuLightingRGB24(u32 gCol) |
| 152 | { |
| 153 | return ((gCol<<19) & (0x1FF<<20)) | |
| 154 | ((gCol>> 2) & (0x1FF<<10)) | |
| 155 | (gCol>>23); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | //////////////////////////////////////////////////////////////////////////////// |
| 160 | // Apply fast (low-precision) 5-bit lighting to bgr555 texture color: |
| 161 | // |
| 162 | // INPUT: |
| 163 | // 'r5','g5','b5' are unsigned 5-bit color values, value of 15 |
| 164 | // is midpoint that doesn't modify that component of texture |
| 165 | // 'uSrc' input: -bbbbbgggggrrrrr |
| 166 | // ^ bit 16 |
| 167 | // RETURNS: |
| 168 | // u16 output: 0bbbbbgggggrrrrr |
| 169 | // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care |
| 170 | //////////////////////////////////////////////////////////////////////////////// |
| 171 | GPU_INLINE uint_fast16_t gpuLightingTXTGeneric(uint_fast16_t uSrc, u8 r5, u8 g5, u8 b5) |
| 172 | { |
| 173 | return (gpu_senquack.LightLUT[((uSrc&0x7C00)>>5) | b5] << 10) | |
| 174 | (gpu_senquack.LightLUT[ (uSrc&0x03E0) | g5] << 5) | |
| 175 | (gpu_senquack.LightLUT[((uSrc&0x001F)<<5) | r5] ); |
| 176 | } |
| 177 | |
| 178 | |
| 179 | //////////////////////////////////////////////////////////////////////////////// |
| 180 | // Apply fast (low-precision) 5-bit Gouraud lighting to bgr555 texture color: |
| 181 | // |
| 182 | // INPUT: |
| 183 | // 'gCol' is a packed Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet, value of |
| 184 | // 15.0 is midpoint that does not modify color of texture |
| 185 | // gCol input : rrrrrXXXXXXgggggXXXXXXbbbbbXXXXX |
| 186 | // ^ bit 31 |
| 187 | // 'uSrc' input: -bbbbbgggggrrrrr |
| 188 | // ^ bit 16 |
| 189 | // RETURNS: |
| 190 | // u16 output: 0bbbbbgggggrrrrr |
| 191 | // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care |
| 192 | //////////////////////////////////////////////////////////////////////////////// |
| 193 | GPU_INLINE uint_fast16_t gpuLightingTXTGouraudGeneric(uint_fast16_t uSrc, u32 gCol) |
| 194 | { |
| 195 | return (gpu_senquack.LightLUT[((uSrc&0x7C00)>>5) | ((gCol>> 5)&0x1F)]<<10) | |
| 196 | (gpu_senquack.LightLUT[ (uSrc&0x03E0) | ((gCol>>16)&0x1F)]<< 5) | |
| 197 | (gpu_senquack.LightLUT[((uSrc&0x001F)<<5) | (gCol>>27) ] ); |
| 198 | } |
| 199 | |
| 200 | |
| 201 | //////////////////////////////////////////////////////////////////////////////// |
| 202 | // Apply high-precision 8-bit lighting to bgr555 texture color, |
| 203 | // returning a padded u32 5.4:5.4:5.4 bgr fixed-pt triplet |
| 204 | // suitable for use with HQ 24-bit lighting/quantization. |
| 205 | // |
| 206 | // INPUT: |
| 207 | // 'r8','g8','b8' are unsigned 8-bit color component values, value of |
| 208 | // 127 is midpoint that doesn't modify that component of texture |
| 209 | // |
| 210 | // uSrc input: -bbbbbgggggrrrrr |
| 211 | // ^ bit 16 |
| 212 | // RETURNS: |
| 213 | // u32 output: 000bbbbbXXXX0gggggXXXX0rrrrrXXXX |
| 214 | // ^ bit 31 |
| 215 | // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care |
| 216 | //////////////////////////////////////////////////////////////////////////////// |
| 217 | GPU_INLINE u32 gpuLightingTXT24(uint_fast16_t uSrc, u8 r8, u8 g8, u8 b8) |
| 218 | { |
| 219 | uint_fast16_t r1 = uSrc&0x001F; |
| 220 | uint_fast16_t g1 = uSrc&0x03E0; |
| 221 | uint_fast16_t b1 = uSrc&0x7C00; |
| 222 | |
| 223 | uint_fast16_t r2 = r8; |
| 224 | uint_fast16_t g2 = g8; |
| 225 | uint_fast16_t b2 = b8; |
| 226 | |
| 227 | u32 r3 = r1 * r2; if (r3 & 0xFFFFF000) r3 = ~0xFFFFF000; |
| 228 | u32 g3 = g1 * g2; if (g3 & 0xFFFE0000) g3 = ~0xFFFE0000; |
| 229 | u32 b3 = b1 * b2; if (b3 & 0xFFC00000) b3 = ~0xFFC00000; |
| 230 | |
| 231 | return ((r3>> 3) ) | |
| 232 | ((g3>> 8)<<10) | |
| 233 | ((b3>>13)<<20); |
| 234 | } |
| 235 | |
| 236 | |
| 237 | //////////////////////////////////////////////////////////////////////////////// |
| 238 | // Apply high-precision 8-bit lighting to bgr555 texture color in 'uSrc', |
| 239 | // returning a padded u32 5.4:5.4:5.4 bgr fixed-pt triplet |
| 240 | // suitable for use with HQ 24-bit lighting/quantization. |
| 241 | // |
| 242 | // INPUT: |
| 243 | // 'uSrc' input: -bbbbbgggggrrrrr |
| 244 | // ^ bit 16 |
| 245 | // 'gCol' input: rrrrrrrrXXXggggggggXXXbbbbbbbbXX |
| 246 | // ^ bit 31 |
| 247 | // RETURNS: |
| 248 | // u32 output: 000bbbbbXXXX0gggggXXXX0rrrrrXXXX |
| 249 | // ^ bit 31 |
| 250 | // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care |
| 251 | //////////////////////////////////////////////////////////////////////////////// |
| 252 | GPU_INLINE u32 gpuLightingTXT24Gouraud(uint_fast16_t uSrc, u32 gCol) |
| 253 | { |
| 254 | uint_fast16_t r1 = uSrc&0x001F; |
| 255 | uint_fast16_t g1 = uSrc&0x03E0; |
| 256 | uint_fast16_t b1 = uSrc&0x7C00; |
| 257 | |
| 258 | uint_fast16_t r2 = (gCol>>24) & 0xFF; |
| 259 | uint_fast16_t g2 = (gCol>>13) & 0xFF; |
| 260 | uint_fast16_t b2 = (gCol>> 2) & 0xFF; |
| 261 | |
| 262 | u32 r3 = r1 * r2; if (r3 & 0xFFFFF000) r3 = ~0xFFFFF000; |
| 263 | u32 g3 = g1 * g2; if (g3 & 0xFFFE0000) g3 = ~0xFFFE0000; |
| 264 | u32 b3 = b1 * b2; if (b3 & 0xFFC00000) b3 = ~0xFFC00000; |
| 265 | |
| 266 | return ((r3>> 3) ) | |
| 267 | ((g3>> 8)<<10) | |
| 268 | ((b3>>13)<<20); |
| 269 | } |
| 270 | |
| 271 | #endif //_OP_LIGHT_H_ |